A processor (30) operates four cylinder engine by controlling respective actuators according to received information and to position the working condition of the engine according to one of the two modes that differ by the number of active cylinders. That r...

A processor (30) operates active valves to control their displacements following one classic mode: such as a control of opening and control of closing of the valves, or one accelerated or non-uniform speed mode. This also includes specific control of openi...

A processor includes functional units (34,38,39) to control valves of a motor next one at least two of the three modes. A press mode is activated relative to the number (n) of active cylinders. A disabled cylinder has its valves maintained closed, relative...

The exchange of the fuel/air mixture is controlled so that the mixture is enclosed at the start of the sliding operating phase (deceleration phase) in the combustion chamber (12) and the mixture is then ignited at the end of this phase. The exchange of the...